OpenEmbedded for medical devices

Transcription

1 OpenEmbedded for medical devices Silvio Laurenti Stefano Cotta Ramusino

2 Norms for medical devices Medical Devices Directive 93/42/EEC any instrument, apparatus, appliance, material or other article whether used alone or in combination including the software necessary for its proper application EN 62304: Software Class B

3 Norms for medical devices 1 - development planning 2 - requirements analysis 3 - architectural design 4 - detailed design 5 - unit implementation and verification 6 - integration and integration testing 7 - system testing 8 - release

4 What is OpenEmbedded? FLOSS framework to create custom embedded Linux distro sets of metadata called recipes build system based on BitBake

5 Poky open source platform build tool complete software development environment based on OpenEmbedded focus on strict packages set

6 Yocto Project not a Linux distribution umbrella project covering a widely of embedded Linux technologies key concepts are: collaboration customization

7 Ångström a Linux distribution based on OpenEmbedded heavily through the Yocto Project feeds of repository with binary packages

8 OE Platform supported Beagle Board Openmoko Dreambox Toradex Colibri Gumstix Palm webos MontaVista KOAN - KaeilOS

9 Nvidia Tegra 2 System-on-Chip dual-core ARM Cortex-A9 CPU Ultra Low Power GeForce GPU lacking ARM's advanced SIMD extension (NEON)

10 OpenEmbedded architecture

11 Bitbake heart building tool system of OpenEmbedded parsing metadata (recipes) generating tasks list executing tasks QA checks written in Python

12 Metadata (Recipes).bb files contain info about software: download source apply patches configure options how to compile how to package output files package is recipes output from OE.ipk files

13 OpenEmbedded layers Metadata are organized, isolated and customized in layers collection of recipes and configuration files used on top of OE-Core to keep it modular i.e. machine support and customization reside in the Board Specific Package (BSP) Layer

14 OpenEmbedded layers recipes-connectivity meta-multimedia meta-networking meta-oe meta-systemd meta-webserver toolchain-layer recipes-core recipes-devtools recipes-graphics recipes-kernel recipes-multimedia recipes-navigation recipes-qt

15 Generated items Package Feeds.ipk packages in different directories corresponding to the target machine architecture Images rootfs - bootloader kernel Toolchain SDK to cross develop on different hosts

16 Making your distro patched Linux kernel hard-float WiFi / Bluetooth / GSM Systemd Udev D-Bus ConnMan / NetworkManager OpenGL-ES 2.0 Qt4

17 Layer modularization Custom Layer (meta-btw) Vendor Layer (meta-toradex) Distro Layer (meta-angstrom) OpenEmbedded Layer (meta-oe)

18 Creating your layer meta-whateveryouwant populate with your software/patches add layer to bblayers.conf init new build directory oe-init-build

19 Bootloader: U-Boot access via serial console init GPIO before kernel contains kernel parameters

20 Kernel: Linux add full support to the custom board initialize GPIO and pinmux /sys/kernel/debug/gpio write/port missing drivers power saving optimization custom boot logo

21 System Manager: systemd reduce shell overhead journalctl --full write service for your application systemd-analyze blame/plot

22 Graphic: FrameBuffer - X.Org psplash display image waiting X.Org xinit launch single graphical application feh display image waiting the main application

23 Frontend: Qt Framework add hardware acceleration support -legl -lglesv2

24 Optimization bootloader boot_delay=0 kernel drivers static CONFIG_LEGACY_PTYS=n remove useless systemd service remove psplash fbv -d 1 logo.bmp; cp /dev/fb0 logo.fb; lzop -9 logo.fb lzop -dc logo.fb.lzo > /dev/fb0

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